Issue with getting CMM related emails

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• CentOS Version: CentOS 7
• Centmin Mod Version Installed: 23.09beta01
• Nginx Version Installed: nginx/1.21.5
• When was last time updated Centmin Mod code base ? : brand new install
• Persistent Config: D
  
  Code (Text):

  NGINX_SSLCACHE_ALLOWOVERRIDE='y'
  SET_DEFAULT_MYSQLCHARSET='utf8mb4'
  AUTOHARDTUNE_NGINXBACKLOG='y'
  ZSTD_LOGROTATE_NGINX='y'
  ZSTD_LOGROTATE_PHPFPM='y'
  NGINX_LIBBROTLI='y'
  NGXDYNAMIC_BROTLI='y'
  PHP_BROTLI='y'
  PHP_PGO='y'
  PHP_LZFOUR='y'
  PHP_LZF='y'
  PHP_ZSTD='y'
  
  MARCH_TARGETNATIVE='n'
  LETSENCRYPT_DETECT='y'
  DUALCERTS='y'
  DISABLE_IPVSIX='y'
  

I just installed CMM on a new VPS and I got the message "You have new mail in /var/spool/mail/root"

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After checking the root mail, I noticed the from and to are the same, both are root@hostname.localdomain. Could this be the issue? This is my first time running into email issue with CMM.

Code (Text):

From root@hostname.localdomain  Tue Jan 11 01:14:11 2022
Return-Path: <root@hostname.localdomain>
X-Original-To: root
Delivered-To: root@hostname.localdomain
Received: by hostname.localdomain (Postfix, from userid 0)
    id D9457119437; Tue, 11 Jan 2022 01:14:11 -0500 (EST)
From: root@hostname.localdomain
To: root@hostname.localdomain
Subject: lfd on hostname: blocked 112.85.42.74 (CN/China/-)
Message-Id: <20220111061411.D9457119437@hostname.localdomain>
Date: Tue, 11 Jan 2022 01:14:11 -0500 (EST)

Time:     Tue Jan 11 01:14:11 2022 -0500
IP:       112.85.42.74 (CN/China/-)
Failures: 5 (sshd)
Interval: 3600 seconds
Blocked:  Permanent Block [LF_SSHD]

 

Its Hetzner, I checked with them a few days ago and was told that they unblocked mail ports for my vps.
I will send an email to their customer service again, hopefully this is the issue.

 

Does this mean you will have to use your own or 3rd party mail server?

 

I just did a test to send an email to my outlook and I got it, but not Gmail, using following command

Code (Text):

echo "mail-test" | mail -s "mail-tester" email@outlook.com

I think Gmail is blocking the email. I will go through the outbound email sending and troubleshooting steps @eva2000 provided and see if I can fix this issue.

 

good luck with the process, I think gmail has a free tier that allows 500 emails/day